Improvement in liquid-meters



2 Sheets-Sheet 2. i. F. DE NAVARRO & H. C. SEHGEANT.,

Liquid Meter.

Patented April 16, 1872.

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UNITEDV STATES ATENT OFFICE.

JOS F. DE NAVARRO AND HENRY O. SERGEANT, OF NEW YORK, N. Y.,

a ASSIGNORS TO JOS F. DE NAVARRO, OF SAME PLAGE.

IMPROVEMENT IN LIQUID-METERS.

Specication forming part of Letters Patent No. 125,794, dated April 16,1872.

Division B.

Speciiication describing certain new and useful Improvements in LiquidMeters, invented by J osi; F. DE NAVARRO and HENRY O. SERGEANT, both ofthe city, county, and State of New York.

The one part of this invention relates to a certain description of valveused, among other purposes or uses, to particular advantage inliquid-meters, said valve being of a hollow cylindrical construction,open at its ends, but divided transversely to form an inlet and outletchamber, and provided with ports or passages in its sides incommunication with said chambers, and operating as said valve isrevolved or reciprocated about its axis, in concert with fixed ports orpassages in the valveseat. Heretofore, in valves of this description,the partition dividing the inlet from the outlet chamber has been fastto or formed in one piece with the body Aof the valve. This induces endor longitudinal thrust on and friction of the valve, by reason of theexcess in pressure of the fluid the valve serves to control, on the oneside of the partition dividing the inlet from the outlet chamber,` overthe pressure of said iuid on the opposite side of the partition. The rstpart of our invention obviates this, and consists in the employment of apiston-like partition supported by a step, or otherwise, independentlyof the valve, to divide the latter into inlet and outlet spaces, andforming an independent transverse surface or piece within the valve, toreceive the end thrust or pressure that otherwise would be thrown uponthe valve by the fluid.` The invention also consists in certain`combinations of parts, and peculiarities of construction, applicable toreciprocating piston-meters using a crank or cranks, whereby we areenabled to work an entire crank or cranks, and support the same at bothends, thereby steadying and easing the general action of the meter, andwhereby increased facility is ai'orded for getting at or removing thepiston or pistons without disturbing the crank or cranks, and devicesset in motion by it or them.

1n the accompanying drawing, which forms part of this specication,Figure l represents a horizontal section of a duplex cylinderwater-meter, havin g a revolving valve constructed in accordance withour invention, and about the general action of which, as regards ,itscontrol of the pistons, and about the gearing of the valve and pistonstogether, nothing here is claimed as new, the same being found in apreviously-patented meter or meters invented by Henry C. Sergeant, oneof the applicants. Said view also shows the mode of connecting thepistons with their cranks. Fig. 2 is a longitudinal vertical section ofthe meter at the irregular line a: x, in Fig. 1, and Fig. 3 a transversevertical section ofthe same, taken mainly through the center of thevalve.

Similar letters of reference `indicate corresponding parts throughoutthe several figures of the drawing. Y A 'A' are the cylinders of themeter, and B B] its reciprocating pistons, which lat ter serve, by meansof connecting-rods B2 B2 to revolve vertical crank-shafts O Cl that aregeared to gether by spur-wheels D D and E, the intermediate wheel Emaking' one revolution for every two revolutions of each of the otherwheels D D', and serving to revolve the cylindrical valve G, by whichthe movements of the pistons are controlled. The cranks O2 C2 of theshafts C C1 are made double or entire, and their shafts supported bothtop and bottom, or with bearings on both sid'es of the connecting-rodsB2 B2, whereby a much smoother` and easier running action is obtainedfor the workin g parts than when half cranks are used. To enter saidcranked shafts within the meter, and to provide for their extensionabove to connect with the gear-wheels or pinions D D',

presents a difficulty which we have met by entering them from abovethrough holes that are afterward closed by screw-bushes or nuts M, saidbushes also serving to form the upper bearings of the crank-shafts. Theconnectingrods B2 B2, are fitted to the cranks C2 O2, by making saidrods of a hook or strap form at their ends m, so as to form half-eyesfor the cranks, and further serving to receive blocks n within them.These blocks close the eyes of the rods on the cranks, and are securedto the rods by screws o,f1tted to pass through the hooked ends m of therods, and the blocks each other to secure a perfect action of the' valverelatively with the pistons or their cranks, and so that the wheels DD4, when thus set may be pinned to their shafts, and the relation in nowise be disturbed by the disconnection or removal of the pistons. Therevolvin g cylindrical valve G that controls the movement of the pistonsis made open top and bottom, and divided intermediately of its length,as hereinafter described, to constitute ,an inlet-chamber, b, andoutlet-chamber d, each of which is provided with oppositely arran gedside ports e, the ports of the inlet-chamber being arranged at rightangles to those of the outlet-chamber. This valve revolves within acylindrical valve-seat, H, provided with ports f, that communicates bychambers or passages with the opposite ends of the cylinders, to effeetthe movement of the pistons, as required. I is thetsupply opening bywhich the Water is admitted to the inlet-chamber b of the valve, throughan upper bonnet, g, and J is the exhaust opening in communication belowwith the outlet chamber d of the valve. K is an independent transversepartition or piston within the valve, and serving to divide theinletchamber b from the outlet-chamber d. This independent partition mayeither be a stationary lixture, or it may be supported in a free mannerwithin the valve, as by a stem, h,and

step below, so as to turn or revolve in common with the valve, as forinstanceby the friction of the sides of the valve on the periphery oredges of the independent partition-which latter or traveling arrangementis preferred. The stem h may be provided with stops or arms i, arrangedto hook under the valve to prevent the independent partition K beingforced upward and out of position in case of a sudden or casual excessof pressure upon it from below, and which is apt to occur by back actionfrom the exhaust on the supply being shut off.

During the operation of the meter, the eX- cess of pressure is usuallyin the inlet-chamber b of the valve. This excess of pressure,

so yfar as regards tendencyto end orlongitudinal thrust on the valve, isreceived and borne by the independent partition K, and the valve yconsequently relieved of much friction.

It may here be observed, in conclusion, that by suitably forming theports in the valve and in its seat, said valve mayeither be whollyrevolved or simply have a reciprocating action about its axis, norestriction here being placed upon the disposition or number of theports. It may also be remarked that the pistons of the meter may be madeeither of metal, hard wood, vulcanized rubber, or any other suitablemateriah and be fitted, if desired, to turn around or about their axesas well as to travel in direction of the length thereof. This may bedone by a ball-and-socket attachment of the pistons with theconnecting-rods they serve to give motion to, or it may be done in anyother way.

What is here claimed, and desired to be secured by Letters Patent, is-

1. The indepcndently-supported transverse partition K within the tubularbody of the valve G, when the latter is constructed with open ends andside ports in communication,

respecttively, with the interior of the body on opposite sides of saidpartition, for operation in concert with iixed ports or passages in thevalve-seat, substantially as specified. y

2. The free or loose and independent partition K, arranged in relationwith the tubular body of the valve G, and provided with a step or stemsupport h, whereby said partition, although indcpendent of thevalve-body is free to rotate in common with it, essentially asdescribed.

3. The'combination of the stops or arms t', with the free andindependent partition K, and tubular body of the valve G, substantiallyas and for the purpose herein set forth.

4. The combination of the screw-bushes M, with the meter cylinders orcase, and the entire cranks C2, operated by the pistons of the meter,essentially as described.

5. The connecting-rods B2, constructed with hook-shaped ends m, incombination with Vthe blocks a, screws o, and entire cranks G2, operatedby the piston of the meter, substantially as specified.

J. F. DE NAVARRO. HENRY C. SERGEANT. Witnesses:

FRED. HAYNEs, FERD TUsoH.

